Box2D  2.3.0
A 2D Physics Engine for Games
b2TimeStep.h
1 /*
2 * Copyright (c) 2006-2011 Erin Catto http://www.box2d.org
3 *
4 * This software is provided 'as-is', without any express or implied
5 * warranty. In no event will the authors be held liable for any damages
6 * arising from the use of this software.
7 * Permission is granted to anyone to use this software for any purpose,
8 * including commercial applications, and to alter it and redistribute it
9 * freely, subject to the following restrictions:
10 * 1. The origin of this software must not be misrepresented; you must not
11 * claim that you wrote the original software. If you use this software
12 * in a product, an acknowledgment in the product documentation would be
13 * appreciated but is not required.
14 * 2. Altered source versions must be plainly marked as such, and must not be
15 * misrepresented as being the original software.
16 * 3. This notice may not be removed or altered from any source distribution.
17 */
18 
19 #ifndef B2_TIME_STEP_H
20 #define B2_TIME_STEP_H
21 
22 #include <Box2D/Common/b2Math.h>
23 
25 struct b2Profile
26 {
27  float32 step;
28  float32 collide;
29  float32 solve;
30  float32 solveInit;
31  float32 solveVelocity;
32  float32 solvePosition;
33  float32 broadphase;
34  float32 solveTOI;
35 };
36 
38 struct b2TimeStep
39 {
40  float32 dt; // time step
41  float32 inv_dt; // inverse time step (0 if dt == 0).
42  float32 dtRatio; // dt * inv_dt0
43  int32 velocityIterations;
44  int32 positionIterations;
45  bool warmStarting;
46 };
47 
49 struct b2Position
50 {
51  b2Vec2 c;
52  float32 a;
53 };
54 
56 struct b2Velocity
57 {
58  b2Vec2 v;
59  float32 w;
60 };
61 
64 {
65  b2TimeStep step;
66  b2Position* positions;
67  b2Velocity* velocities;
68 };
69 
70 #endif
Profiling data. Times are in milliseconds.
Definition: b2TimeStep.h:25
This is an internal structure.
Definition: b2TimeStep.h:49
Solver Data.
Definition: b2TimeStep.h:63
This is an internal structure.
Definition: b2TimeStep.h:38
This is an internal structure.
Definition: b2TimeStep.h:56
A 2D column vector.
Definition: b2Math.h:53